Miter-cutting machine.



No. 687,209. Patented Nov. 26, 1901. P. nmmmus.

MITER CUTTING MACHINE.

(Application filed Jan. 25, 1901.)

2 Sheets-Sheet (No Model.)

WITNESSES Yam Tm: Nonms PETERS o0. PHOTO-LING."NASHINGTDN D- P.

No. 687,209. Patented Nov. 26,190!

' P. DBINKAUS.

MITER CUTTING MACHINE.

(Application fllad J's-n. 25, 1901'.) (No Model.) 2 Sheets-Sheet 2.

WITNESSES: INVENTQRv v E AYRQR nuxnkqms W/IWM S \\une:ss

7 NITED STATES PHILLIPP DRINKAUS, OF DETROIT, MICHIGAN.

fMITER-CUTT ING MACHINE.

SPECIFICATION forming part of Letters Patent No.

687,209, dated November 26, 1901.

Application filed January 25, 1901. Serial No. 44,662. (NomodeL) To allwhom, it may concern.-

Be it known that I, PHILLIP DRINKAUS, a citizen'of the United States ofAmerica, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful ImprovementsinMiter-Cutting Machines, of which the following is a specification,reference being companying drawings.

The invention has particular reference to a mitering-machineparticularlydesigned for the manufacture of pictureframes; and theinvention consists in certain novelfeatures of construction and inthe'combination of parts, all as hereinafter more fully described, andparticularly pointed out in thespecification and claims.

In the accompanying drawings, Figure lis a side elevation of themiteri'ng machine, partly in section, showing the saw and guide hadtherein to the acthrown back in dotted lines. Fig. 2 is a plan viewthereof with the saw-guide thrown back.

Fig. 3 is a perspective view showingthe worktable and saw-guidethrownback as in the act of nailing'the corners of the frame. Fig.

4 is a plan'view of the base portion with the top removed. Fig. 5 is aplan view of one of the detachable clamping-plates. Fig. 6 is a sectionon line 00 00, Fig. 2, showing one of the detachable clamping-plates asin use with a molding having a deep undercut.

The standard'or support consists of the base 1, secured to the top ofthe work-bench by means of screws, as shown, and having a hollow shankportion 2 hinged thereto at one side, a suitable stop 3 being providedto limit the movement of the hinged portion, and a lockingplate 8 tohold the parts together when desired.

t is the work-table, provided on its under side with a stub-shaft 5,adapted to be detachably secured in the hollow shank portion 2, free toturn therein by means of the thumbscrew 7, and 8 designates lugs formedon the upper edge of said shank portion, against which the stop-pin 9 isadapted to strike to limit the horizontal rotation of the work-table. Ipreferably have the upper edge of the hollow shank cut out on each side,as shown, so that the work-table may be reversed should occasionrequire'it.

The work-table proper comprises the'worksupporting arms 10 10 at rightangles to each other, with their meeting ends to the front, and the arms11 11 at an obtuse angle to each other and provided with the hand-screws18, swiveled therein, carrying theclamping-jaws 14:, adapted to engagethe outer edge of a picture-frame molding and clamp the same against theshoulder or walls 15of the arms 10. It will be seen that by making thearms 11 at an acute angle to the'arms 10 it Will have a slight tendencyto fo'rce'the meeting edges of the frame together while being clamped,thus insuring a perfect joint.

16.is a rearward extension of the work-table integrally formed therewithin a plane slightly below the same to form a stop for the saw andsaw-guide when thrown back, and is provided with a cut-out portion 16 toprevent the saw-teeth from striking the same when in use.

17 is a saw guide or frame provided with cone-bearings at right anglesto the guide proper, said guide or frame being pivotally secured betweenthe downwardly-extending portions 18 of the arms 10 by means of theconical adjusting-screws 19, so that all wear may be taken up and saidguide or frame adjusted laterally over the work-table in perfectalinement therewith, said guide or frame being adapted to be thrown backagainst the stop 20, as indicated in dotted lines in Fig. 1.

' 21 represents guide-arms at front and rear of said frame, and 21 is astraight-back or miter saw adapted to travel in said guide-arms free tohave a limited vertical movement therein.

By reason of the saw-guide 17 being pivotally mounted in rear of thework-table the saw' 'is given slightly more vertical play in the forwardarm of the guide than in the rear to compensate for the difference inmoveinent between the same, as shown in Fig. 1, the stops 22 being inthe same horizontal plane, so that after the-molding has been cut thesaw will be in a horizontal position clear of the Work-table andnormally maintained in that position While sawing.

22 represents additional stops to guide the saw-blade proper, and-23representsa'djustable stops adapted to steady the lower edge of thesaw-blade where an extra wide blade is used.

23 is a vertically-adjustable stop adapted to hold the saw-guide anydesired distance above the work-table to permit the saw to cut throughthe molding and still not come in contact with the work-table, a groove24 being provided, as shown, in the work-table.

25 is a suitable rule which may be attached to either one of the arms 10and is provided with an adjustable gage-stop 26vfor use in measuring themolding when a number of the pieces are to be cut of the same length,while 27 is a thin plate adapted to he slipped on over the clamping-jaws14 when a molding with a deep undercut or lighter molding is being used.I

It will be seen that my machine can be used on either the right or lefthand end of the bench and that the work-table tips at right angles tothe tilting of the saw-guide, which has not been done heretofore, and itwill be noticed that both ends of the clamping-screws are swiveled inthe work-table, as shown in Fig. 6, thus preventing the clamping-jawsfrom rising when in use.

Having thus fully described my invention, itis intended to operate asfollows: The molding having been first cut to the desired length the sawand saw-guide are swung back out of the way and the molding clamped uponthe work-table against the shoulders 15, with their miter-jointstogether by the action of the clamping-screws 13, which by reason ofbeing arranged at an obtuse angle to each other tend through the mediumof the clamping-jaws to crowd the abutting ends of the molding together, as will be readily seen from the drawings, thus insuringaperfect joint and at the same time leaving the greatest amount of roomfor free access to the miter-joint for nailing, which on account of thefacility for nailing is preferably done with the work-table in thehorizontal position, although, if desired, it can be turned upon itsside, as shown in Fig. 3, and as the stop-pin 9 abuts against one of thelugs 8 a perfectly solid support is formed while nailing in the inclinedposition, thus leaving both ends free. .The operation is thus repeatedfor each corner of the frame.

Having thus fully described my invention, what I desire to secure byLetters Patent is- 1. In a mitering-machine, the combination of a base,having a hollow shank or support hinged thereto at one side, awork-supporting table provided with a stub-shaft on its under side freeto turn in said support, lugs formed on the upper end of said support,and a stoppin carried by the work-table to limit the horizontal movementof the same, of a sawguide having horizontal bearings in thesupporting-table at right angles to the saw-guide whereby it may beswung away from said table, said saw-guide being constructed to receivea saw and permit it to reciprocate therein.

2. In a mitering-machine, the combination with a work-table havingstationary jaws, of a base having a socketed support hinged thereto atone side free to tilt thereon, a stub-shaft carried by said work-tablefree to rotate in said socket, and stops to limit the horizontalrotation of the table, of a sawguide carried by the table free to bethrown back at an angle thereto, a saw fitted to the guiding device andadapted to reciprocate therein, of opposing movable jaws cooperatingwith the stationary jaws and screws for operating the same, each movablejaw having a slight side motion toward each other to crowd the meetingends of a frame together.

3. In a mitering-machine, the combination with a turn-table havingstationary ledges or jaws at right angles to each other, a sawguidepivoted in the table and a saw adapted to reciprocate therein, of a pairof opposing movable jaws parallel to the stationary jaws, and screws forindependently operating the same, each movable jaw having a combinedside and forward movement irrespective of the other jaw whereby theabutting ends of a picture-frame are crowded together as they areclamped between the jaws.

4:- In a mitering-machine, the combination with a table havingstationary jaws formed thereon, of a pair of movable jaws cooperatin gwith the stationary jaws, and hand-screws arranged at an obtuse angle toeach other for independently operating the movable jaws,

whereby a combined side and forward move ment is imparted to said jawsto crowd the abutting ends of a frame together.

5. In a mitering-machine,the combination with the base of a supporthinged thereto at one side free to tilt thereon, a work-table pivotallymounted in said support, a pair of clamping-jaws carried by thework-table at right angles to each other and a saw-guide laterallyadjustably mounted in bearings at right angles thereto, whereby saidsaw-guide may be swung in a vertical plane at an angle to the work-tableand a stop carried by said work-table against which said guide isadapted to strike.

6. In a mitering-machine, the combination with the base of a socketedstandard or support hinged thereto at one side free to tilt thereon, awork-s11 pporting table pivotally mounted in said support, stops tolimit the horizontal rotation of the table, a saw-guide at right anglesto the work-table pivotally mounted in bearings carried by the table,and a stop whereby said saw-guide may be vertically adjusted in relationto the table.

7. In a mitering-machine, the combination with a turn table havingstationary jaws formed thereon, of a pair of movable jaws cooperatingwith the stationary jaws, and means for operating the movable jawsindependently of each other, whereby a combined side and forwardmovement is imparted to said jaws to crowd the abutting ends of a frametogether.

8. In a mitering-machine, the combination with the supporting-base,saw-guide and saw, of a work-table comprising the arms 10 at IIO rightangles to each other carrying the stationary members of theclamping-jaws, and the arms 11 at an obtuse angle to each other carryingthe movable members of the clamping-jaws whereby the adjacent ends of apicture-frame molding are adapted to be clamped upon the work-table.

9. In a mitering-machine, the combination with a fixed base, of asupporting-standard hinged thereon and adapted to be tilted at an anglethereto, of a work-table having a limited rotary movement, carrying apair of fixed and movable jaws at right angles to each other, and asaw-guide pivotally mounted at right angles to the work-table, adaptedto maintain the saw in horizontal position while sawing, free to have alimited vertical movement therein.

- which said guide is 10. In a mitering-machine, the combination withthe base, of a support hinged thereto at one side free to tilt thereon,a work-table pivotal1y mounted in said support, a pair of clamping-jawscarried by the work-table at right angles to each other, a saw-guidepivotally mounted in bearings carried by the work-table, free to tiltthereon, and a rearward extension of the work-table against adapted torest when in its elevated position.

In testimony whereof I aftix my signature in presence of two Witnesses.

PHILLIPP DRINKAUS.

Witnesses:

OTTO F. BARTHEL, J OSEPH A. N OELKE.

